<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Promise关键问题 - 中断 Promise 链条</title>
</head>
<body>
    <script>
        let p = new Promise((resolve, reject) => {
            setTimeout(() => {
                resolve('OK');
            }, 1000);
        });

        p.then(value => {
            console.log(111, value);
        }).then(value => {
            console.log(222, value);
            //有且只有一个方式  终端promise链条
            return new Promise(() => {});
        }).then(value => {
            console.log(333, value);
        }).catch(reason => {
            console.warn(reason);
        });
    </script>
</body>
</html>